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       1              : /* Utilities for querying and manipulating type trees.
       2              :    Copyright (C) 2013-2026 Free Software Foundation, Inc.
       3              : 
       4              : This file is part of GCC.
       5              : 
       6              : GCC is free software; you can redistribute it and/or modify
       7              : it under the terms of the GNU General Public License as published by
       8              : the Free Software Foundation; either version 3, or (at your option)
       9              : any later version.
      10              : 
      11              : GCC is distributed in the hope that it will be useful,
      12              : but WITHOUT ANY WARRANTY; without even the implied warranty of
      13              : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14              : GNU General Public License for more details.
      15              : 
      16              : You should have received a copy of the GNU General Public License
      17              : along with GCC; see the file COPYING3.  If not see
      18              : <http://www.gnu.org/licenses/>.  */
      19              : 
      20              : #ifndef GCC_CP_TYPE_UTILS_H
      21              : #define GCC_CP_TYPE_UTILS_H
      22              : 
      23              : /* Returns the first tree within T that is directly matched by PRED.  T may be a
      24              :    type or PARM_DECL and is incrementally decomposed toward its type-specifier
      25              :    until a match is found.  NULL is returned if PRED does not match any
      26              :    part of T.
      27              : 
      28              :    This is primarily intended for detecting whether T uses `auto' or a concept
      29              :    identifier.  Since either of these can only appear as a type-specifier for
      30              :    the declaration in question, only top-level qualifications are traversed;
      31              :    find_type_usage does not look through the whole type.  */
      32              : 
      33              : inline tree
      34   4096604294 : find_type_usage (tree t, bool (*pred) (const_tree))
      35              : {
      36   5451308729 :   if (pred (t))
      37              :     return t;
      38              : 
      39   5324984463 :   enum tree_code code = TREE_CODE (t);
      40              : 
      41   5324984463 :   if (code == POINTER_TYPE || code == REFERENCE_TYPE
      42   5324984463 :       || code == PARM_DECL || code == OFFSET_TYPE
      43              :       || code == FUNCTION_TYPE || code == METHOD_TYPE
      44              :       || code == ARRAY_TYPE)
      45   1352882625 :     return find_type_usage (TREE_TYPE (t), pred);
      46              : 
      47    859682876 :   if (TYPE_PTRMEMFUNC_P (t))
      48      1821810 :     return find_type_usage
      49      1821810 :       (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred);
      50              : 
      51              :   return NULL_TREE;
      52              : }
      53              : 
      54              : #endif // GCC_CP_TYPE_UTILS_H